Diesel engine self-purification EGR device

The invention discloses a diesel engine self-purification EGR device. The diesel engine self-purification EGR device comprises a shell, wherein the shell is of a hollow structure and is internally provided with a partition plate which is horizontally arranged; two ends of the partition plate are fixedly connected with the inner walls of two sides of the shell; air inlets and air outlets which aresymmetrically formed are separately formed in the side walls of the two sides of the shell; a telescopic sleeve rod is fixedly connected with the inner wall of one side of the shell; the telescopic sleeve rod comprises a first supporting rod and a second supporting rod; the first supporting rod is of a hollow structure; the second supporting rod is inserted into the first supporting rod; the second supporting rod is of a hollow structure; and one end of the second supporting rod is connected with the bottom wall of the first supporting rod through a buffer device, and the other end of the second supporting rod penetra